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[samr21] Remove memcpy from otPlatRadioTransmit (#3491)

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samr21 rf driver requires that first byte of transmit buffer should be
psdu length. The psdu was copied to a local buffer with one byte shift then
the local buffer was passed to rf driver. This copying is removed by
extending length of sTransmitPsdu by 1 byte and use &sTransmitPsdu[1] as
transmit frame psdu.

Signed-off-by: Oleksandr Grytsov <[email protected]>
This commit is contained in:
Oleksandr Grytsov
2019-02-04 18:24:37 -08:00
committed by Jonathan Hui
parent 68d527a530
commit 9fee87c071
1 changed files with 4 additions and 7 deletions
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examples/platforms/samr21/radio.c
+4 -7
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@@ -56,7 +56,7 @@ enum
};
static otRadioFrame sTransmitFrame;
static uint8_t sTransmitPsdu[OT_RADIO_FRAME_MAX_SIZE];
static uint8_t sTransmitPsdu[OT_RADIO_FRAME_MAX_SIZE + 1];
static otRadioFrame sReceiveFrame;
@@ -307,7 +307,7 @@ void PHY_DataConf(uint8_t status)
void samr21RadioInit(void)
{
sTransmitFrame.mLength = 0;
sTransmitFrame.mPsdu = sTransmitPsdu;
sTransmitFrame.mPsdu = sTransmitPsdu + 1;
sReceiveFrame.mLength = 0;
sReceiveFrame.mPsdu = NULL;
@@ -492,14 +492,11 @@ otError otPlatRadioTransmit(otInstance *aInstance, otRadioFrame *aFrame)
otEXPECT_ACTION(sState == OT_RADIO_STATE_RECEIVE, error = OT_ERROR_INVALID_STATE);
uint8_t frame[OT_RADIO_FRAME_MAX_SIZE + 1];
setChannel(aFrame->mChannel);
frame[0] = aFrame->mLength - IEEE802154_FCS_SIZE;
memcpy(frame + 1, aFrame->mPsdu, aFrame->mLength);
aFrame->mPsdu[-1] = aFrame->mLength - IEEE802154_FCS_SIZE;
PHY_DataReq(frame);
PHY_DataReq(&aFrame->mPsdu[-1]);
otPlatRadioTxStarted(aInstance, aFrame);